Bolt-clipper.



PATENTED SEPT. 4, 190e. E K PORTER BOLT GLITTER.

AFPLIOATION FILED AUG. 31, 1905.

UNITED 'sTATEs PATENT oEEioE.

Specification of Letters Patent. Appiication med August 31, 1905. serialNo. 276,513.

Patented sepa-1,1906.

To @ZZ whom, it may concern.'

Be it known that I, HENRY K. PORTER, a citizen ofthe United States,residing at Chelsea, in the county of Suffolk and State ofMassachusetts, have invented a new and use- Improvement inBolt-Clippers, of which the following is a specification.

My invention relates to the class of such tools in which thecutting-blades are operated through compound levers, and is madeadjustable by means of a novel construction. illustrated in theaccompanying drawings, in which Figure 1 is a plan of the tool embodyingmy invention, including a cross-section of the cutting blades or edges.Fig. 2 is an edge view of the same. Fig. 3 is an inner edge view of oneof the Fig. 4 is alperspective of one of the pivotal handle-lever boltsand its cutting-lever bushing-block, which are em loyed to adjustablyconnect the handleevers and cutter-levers. Fig. 5 is an elevation of thenotched cutter-lever bolt and an under side plan of same. Fig. 6 is across-section on the devious line 6 6, Fig. 1. Figs. 7, 8, and 9 aredifferent views of a modification which show a device independent of thehandle-levers for preventing the movement with the cutter-levers of theadjustingscrews.

This clipper differs from others heretofore invented and `patented by memainly in the mode of adjusting the cutting edges through theiractuating-levers. It comprises the usual p'air of cutter-levers A A,having the cutting blades or edges v ing teeth on the meeting edges ofthe cutterlevers, as shown-inbreken lines. The cutter-levers are pivotedby bolts C C', which pass through cross straps or plates D on 0p-lposite sides of the levers. The bolts C C have left and rightscrew-threads, respectively, by which they are screwed into the lowercross-strap D, bolt C being left-handed and C right-handed,corresponding to the movements of their respective cutter-levers .whenoperated to cut, thus avoiding the tendency whichmight exist to turn thepivotbolts by friction between the levers and bolts under the stress ofcutting and to such an extent as to so clamp the levers between the'straps as to render the use of the tool impracticable or impossible. Tomore positively guard the bolts against such frictional turning, I formnotches or ratchet-teeth C2 handle-levers detachedf from thecutter-lever.

B B and interlock-v in the under sides of the heads of the bolts, asshown in Fig. 5. The salient angles of l these notches or teeth beingproperly temjpered will resist such frictional turning of j the bolts bybiting into the softer surface of j the strap against which they areturned, the

j ratchet-teeth under the heads being formed right-handed andleft-handed, respectively, l corresponding with the screw-threads on thcbolts. The levers A and A are also joined by bolts to the handle-leversE E at A2 A3, while the handles are pivoted together at'EZ. Thus far,with the exception of the ratchetteeth under the heads of the bolts,this is old. Theiddescription will now depart from what 1s o Thelever-handles are formed with branches G G, each of which describes anarc of a circle whose center is the pivot E2. In the actuated ends H Hof the cutter-levers A A are formed slots, one of which is shown indotted lines at I, Fig. 1. These slots afford a limited movement of theends of the cutter-levers independently of the action of thehandle-levers with which they are joined. This is for purposes ofadjustment, as follows: A block J forming a partial bushing, is fittedyin each of said slots, and through the block is passed the pivotal boltK, as shown in the perspective, Fig. 4, and also through thehandle-lever E', where it is secured by nut K. able only with handle E Earound the pivot E2., To accomplish the adjustment of the cutter-leversreferred to above, a pair of adjusting-screws L L are threaded laterallyinto the ends of the cutter-levers and extended through to the blocks.The arms or branches G G on the handles embrace the ends of the pair ofcutter-levers, somewhat like a Spanner and serve as stops against theouter ends of the adjusting-screws to prevent their movement with thecutter-levers outwardly, and the blocks serve as stops against the innerends of the screws to prevent such movement inwardly. To adjust thecutterlevers with reference to the cutting edges B B in case of awearing or breaking away of the edges so that it becomes necessary ordesirable to adjust the edges closer together, the screws L L are turnedin a direction to screw them toward the blocks; but being confinedbetween the blocks and handle branches no lineal advancement of thescrews is practicable. Hence the action of the screws upon thecutter-levers is to draw the These bolts and blocks are movroo V IIOlevers toward the heads of the screws, and thus to close the cuttingedges nearer together. A reversal of the adjusting-screws operates inlike manner to separate the cutting edges. The slots I affordsufficient, play of the levers to effect such adjustment.

In lieu of the branches G, formed on the handles E, as shown anddescribed, a device which I term a bail, clearly shown in Fig. S andmarked M, may be employed to support the adjusting-screws againstendwise movement independently of the handles. The bail M is formed andadapted to embrace the combined cutter -levers and handle levers and tobe secured thereto by the pivotal bolt K, the screw L in this case beingformed with' a pintle L2, Which passes through a hole in the bail, asshown, to keep the bail in right relation to the end of the screw tohold the latter from endwise movement, thus serving the same purpose andas effectively as the branches G on the handles E.

I claim- 1. A bolt-clipper embodying the combination of a pair ofpivoted cutter-levers having slotted ends; a pair of handle-leverspivoted to each other, and joined to the cutter-levers by bolts throughthe slots in their ends; a pair of adjusting-screws threaded into theslotted ends of the cutter-levers; and means arranged to hold theadjusting-screws in place against endWise movement thereof; allulstantially as andfor the purposes speci- 2. In a bolt-clipper, thecombination of a pair of pivoted cutter-levers, h'aving slotted ends; apair of handle-levers, having curved arms Jformed thereon, and pivotedtogether and to the slotted ends ofthe cutter-levers; a pair ofbushing-blocks fitted to the slots in the cutter-levers, and heldinplace by the pivotal bolts, and a pair of adjusting-screws threaded intothe slotted ends of'the cutterlevers; all substantially as and for thepurposes specified.

HENRY K. PORTER.

Witnesses:

EUGENE HUMPHREY, JAMES E. LEACH. y

